Wireless Network Node Identifier Partitioning for Interference Reduction
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Solution Overview
Problem
In heterogeneous wireless telecommunications networks, co-channel deployments of macro and small cells experience significant interference, leading to control plane failures and handover issues due to the lack of inter-cell coordination, which results in unreliable handovers and data decoding errors, especially in high-density small cell deployments.
Innovation Solution
The method involves partitioning user equipment identifiers into subsets to allocate them in locations within the control plane resources that minimize interference, using power control techniques based on UE mobility status and cell-edge proximity to reduce collisions and enhance control message reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If co-channel deployment of macro and small cells is implemented to increase network capacity and coverage, then network capacity and coverage are improved, but interference between control messages increases leading to control plane failures
Solution Approach 1:
The patent segments the control plane resources by partitioning user equipment identifiers into different subsets that are allocated to different cells in a coordinated manner. This segmentation of identifier spaces creates separated resource allocation patterns that reduce control message interference while maintaining network capacity.
Solution Approach 2:
The patent applies local quality by allocating different subsets of user equipment identifiers to different cells based on their specific locations and interference characteristics. Each cell receives a tailored subset allocation that optimizes its local control channel performance while contributing to overall network capacity.
2Productivity
If small cells are deployed in high traffic areas to offload traffic, then traffic handling capacity is improved, but interference between neighbouring cells increases causing handover failures
Solution Approach 1:
The patent segments identifier allocation across neighbouring cells to ensure that small cells in high traffic areas receive identifier subsets that minimize overlap and interference with adjacent cells. This enables aggressive small cell deployment for traffic offloading while maintaining reliable handovers through coordinated identifier management.
Solution Approach 2:
The patent changes the parameter of identifier subset allocation dynamically or semi-statically based on traffic conditions and cell geography. By adjusting which identifier subsets are assigned to which cells, the system optimizes both traffic handling capacity and handover reliability under varying load conditions.
3Ease of operation
If user equipment identifiers are allocated without inter-cell coordination, then allocation simplicity is maintained, but interference between control messages increases leading to data decoding errors
Solution Approach 1:
The patent implements preliminary action by pre-coordinating and partitioning user equipment identifier subsets across cells before actual identifier allocation occurs. This upfront coordination establishes interference-minimizing allocation patterns that simplify ongoing operations while ensuring data decoding reliability through reduced control message interference.
Solution Approach 2:
The patent introduces an intermediary coordination mechanism that manages identifier subset allocation across cells. This intermediary layer handles the complexity of inter-cell coordination centrally or semi-centrally, allowing individual cells to maintain simple local allocation procedures while achieving globally optimized interference reduction for reliable data decoding.
Data Source
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AI summary
Wireless telecommunications network nodes, methods and computer program products are disclosed. The wireless telecommunications network node method, comprises: identifying a set of user equipment identifiers usable by cells for allocation to user equipment being supported by said cells; defining a set of neighbouring co-channel cells comprising a plurality of cells; and determining a plurality of subsets of said user equipment identifiers, each subset of said user equipment identifiers being allocatable to an associated one said plurality of cells, user equipment identifiers from said plurality of subsets of user equipment identifiers, when allocated to user equipment, locating corresponding messages for said user equipment within a resource at locations which reduce interference between those messages. By partitioning the user equipment identifiers, user equipment identifiers which, if allocated to co-channel user equipment would otherwise locate messages at locations which would cause interference, can instead be allocated to reduce or minimise interference.